More about usBillennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!About the RoleWe are looking for an experienced Senior Design/Developer (React & UI/UX) who will join a project for our client from the financial services sector. This role combines UX leadership, design system ownership, and hands-on front-end engineering. You will work closely with business stakeholders, designers, and developers to create enterprise-grade portal experiences that are intuitive, accessible, and scalable.The role is hybrid - 3 days a week from the Client's office in Warsaw.What you will doLead the end-to-end UX process, from requirements gathering and discovery workshops to wireframes, prototypes, and high-fidelity designs.Define and govern UI/UX standards, design systems, and interaction patterns across portal applications.Architect and develop reusable React.js and TypeScript components while setting technical direction for the front-end team.Mentor developers through code reviews, design feedback, and best-practice guidance in UI/UX and React development.Drive accessibility, usability testing, and continuous improvements based on user feedback and business needs.What we are looking for14+ years of software or product design experience, including 8+ years of hands-on React.js and TypeScript development.Expert-level proficiency with Figma and extensive experience building and maintaining design systems and component libraries.Strong experience translating business requirements into responsive, accessible, production-ready user interfaces.Hands-on knowledge of modern front-end architecture, CI/CD pipelines, and containerized environments (Docker, Kubernetes, OpenShift).Excellent stakeholder management, communication, and leadership skills, with experience mentoring teams and reviewing code.Perks and benefits (our offer)Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.Global collaboration - work with a diverse, international team.Innovative environment - be part of a forward-thinking and growth-oriented workplace.Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.Team-building events including our company tradition (annual company event in Mazury).A pleasant surprise to start your journey with us in the form of a welcome pack.Recruitment processHR callInterview with the dedicated ClientFinal decision / FeedbackSounds interesting? Click "Apply" and have a chance to hear more! 🚀

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